ASTM D522/D522M-17

Standard Test Methods for Mandrel Bend Test of Attached Organic Coatings

SIGNIFICANCE AND USE
4.1 Coatings attached to substrates are elongated when the substrates are dimensionally unstable, or are bent during the manufacture of articles or when the articles are abused in service. These test methods have been useful in rating attached coatings for their ability to resist cracking when elongated. They have been useful in evaluating the flexibility of coatings on flexible substrates. The elongation of coating films may also be tested using Test Method D2370. The correlation between elongation determined in accordance with Test Methods D522/D522M and D2370 is unknown.
SCOPE
1.1 These test methods cover the determination of the resistance to cracking (flexibility) of attached organic coatings on substrates of sheet metal or rubber-type materials.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Historical
• Publication Date: 30-Jun-2017
• ICS: 25.220.60 - Organic coatings
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.23 - Physical Properties of Applied Paint Films

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D522/D522M −17
Standard Test Methods for
1
Mandrel Bend Test of Attached Organic Coatings
This standard is issued under the fixed designation D522/D522M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Film Thickness of Nonmagnetic Coatings Applied to
Ferrous Metals and Nonmagnetic, Nonconductive Coat-
1.1 These test methods cover the determination of the
ings Applied to Non-Ferrous Metals
resistance to cracking (flexibility) of attached organic coatings
on substrates of sheet metal or rubber-type materials.
3. Summary of Test Method
1.2 The values stated in either SI units or inch-pound units
3.1 The coating materials under test are applied at uniform
are to be regarded separately as standard. The values stated in
thickness to panels of sheet metal or rubber-type materials.
each system may not be exact equivalents; therefore, each
After drying or curing the coated panels are bent over a
system shall be used independently of the other. Combining
mandrel and the resistance to cracking of the coating is
values from the two systems may result in non-conformance
determined. In Test Method A the coated panels are bent over
with the standard.
aconicalmandrel.InTestMethodBthecoatedpanelsarebent
1.3 This standard does not purport to address all of the
over cylindrical mandrels of various diameters.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety, health and environmental practices and deter-
4.1 Coatings attached to substrates are elongated when the
mine the applicability of regulatory limitations prior to use.
substrates are dimensionally unstable, or are bent during the
1.4 This international standard was developed in accor-
manufacture of articles or when the articles are abused in
dance with internationally recognized principles on standard-
service.These test methods have been useful in rating attached
ization established in the Decision on Principles for the
coatings for their ability to resist cracking when elongated.
Development of International Standards, Guides and Recom-
They have been useful in evaluating the flexibility of coatings
mendations issued by the World Trade Organization Technical
onflexiblesubstrates.Theelongationofcoatingfilmsmayalso
Barriers to Trade (TBT) Committee.
be tested using Test Method D2370. The correlation between
elongation determined in accordance withTest Methods D522/
2. Referenced Documents
D522M and D2370 is unknown.
2
2.1 ASTM Standards:
D823Practices for Producing Films of Uniform Thickness
5. Test Specimen
of Paint, Varnish, and Related Products on Test Panels
5.1 Substrates:
D1005Test Method for Measurement of Dry-Film Thick-
5.1.1 Ifthepurposeofthetestistodeterminethepercentof
ness of Organic Coatings Using Micrometers
elongation of the coating material, the substrate shall be
D2370Test Method for Tensile Properties of Organic Coat-
1
cold-rolled steel strip 0.8 mm [ ⁄32 in.] (22 gage) thick.
ings
5.1.2 If the purpose of the test is to rate the coated material
D7091Practice for Nondestructive Measurement of Dry
for resistance to cracking, the substrate may be any type of
sheet metal or rubber-type material (for example, steel,
1 aluminum, tinplate, or synthetic rubber). The thickness of the
These test methods are under the jurisdiction of ASTM Committee D01 on
1
Paint and Related Coatings, Materials, and Applications and are the direct
sheetmetalmaybelessthan0.8mm[ ⁄32in.]andthethickness
responsibility of Subcommittee D01.23 on Physical Properties of Applied Paint
1
of the rubber-type materials may be as great as 13 mm [ ⁄2 in.].
Films.
5.1.3 The recommended panel size is 100 mm [4 in.] in
Current edition approved July 1, 2017. Published September 2017. Originally
widthand150mm[6in.]inlength.Themaximumsizethatthe
approved in 1939. Last previous edition approved in 2013 as D522–13. DOI:
1
10.1520/D0522_D0522M-17.
conical mandrel can accommodate is 115 mm [4 ⁄2 in.] wide
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
1
and 190 mm [7 ⁄2 in.] long.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.1.4 The surface preparation of the substrate shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. agreed upon between the purchaser and the seller. Prior to the
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D522/D522M − 13 D522/D522M − 17
Standard Test Methods for
1
Mandrel Bend Test of Attached Organic Coatings
This standard is issued under the fixed designation D522/D522M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 These test methods cover the determination of the resistance to cracking (flexibility) of attached organic coatings on
substrates of sheet metal or rubber-type materials.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D823 Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels
D1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D2370 Test Method for Tensile Properties of Organic Coatings
D7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals
and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous Metals
3. Summary of Test Method
3.1 The coating materials under test are applied at uniform thickness to panels of sheet metal or rubber-type materials. After
drying or curing the coated panels are bent over a mandrel and the resistance to cracking of the coating is determined. In Test
Method A the coated panels are bent over a conical mandrel. In Test Method B the coated panels are bent over cylindrical mandrels
of various diameters.
4. Significance and Use
4.1 Coatings attached to substrates are elongated when the substrates are dimensionally unstable, or are bent during the
manufacture of articles or when the articles are abused in service. These test methods have been useful in rating attached coatings
for their ability to resist cracking when elongated. They have been useful in evaluating the flexibility of coatings on flexible
substrates. The elongation of coating films may also be tested using Test Method D2370. The correlation between elongation
determined in accordance with Test Methods D522/D522M and D2370 is unknown.
5. Test Specimen
5.1 Substrates:
1
These test methods are under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and are the direct responsibility of
Subcommittee D01.23 on Physical Properties of Applied Paint Films.
Current edition approved Nov. 1, 2013July 1, 2017. Published December 2013September 2017. Originally approved in 1939. Last previous edition approved in 20082013
as D522 – 93a (2008).D522 – 13. DOI: 10.1520/D0522_D0522M-13.10.1520/D0522_D0522M-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D522/D522M − 17
5.1.1 If the purpose of the test is to determine the percent of elongation of the coating material, the substrate shall be cold-rolled
1
steel strip 0.8 mm [ ⁄32 in.] (22 gage) thick.
5.1.2 If the purpose of the test is to rate the coated material for resistance to cracking, the substrate may be any type of sheet
metal or rubber-type material (for example, s
...